Create variables

Form1.cs

@@ -3,13 +3,15 @@ namespace GuessTheCard
     public partial class Form1 : Form
     {
         private int score = 0;
+        private int previousDice;
+        private Random random = new Random();
 
         public Form1()
         {
             InitializeComponent();
 
-            Random random = new Random();
             int randomDice = random.Next(1, 7);
+            previousDice = randomDice;
             labelCard.Text = "Result : " + randomDice;
             labelScore.Text = "Score: " + score;
         }